gangstarap: don't belittle private sector placements or those who opt for it. the private sector can be as challenging as the academic world. try it: your wrong analysis could send people, nations, bankrupt.
2 people graduating from duke placed in lehman brothers and brattle group. from their cv's they are Good, if not excellent, and could have placed in a good program as professors. but they chose the private sector for various reasons, maybe more money, maybe they want to see the real world( or they just don't want an academic career)
true, the phd is primarily meant as preparation for academic teaching and research( or so they say). but due to their discipline, patience, drive, analytical skills, they make excellent researchers at I-banks and the private sector in general. in fact, quantitative phd's have some competitive advantage over master's in financial engineering job market. probably it's because they don't like to spend time and money to train people for some wall street types to make millions of them, that's why the schools say phd prepares students for academia, not because they consider private sector to be default or less glamorous positions.
basically, people decide to go for the private sector because of their personal choices(they don't fancy academic career anymore, they like more money, or they want to see the real thing, they can take the long hours and tension and pressure, or something else) not because they are from terrible schools.
grads from top schools also have some--but not definite--advantage over grads from lesser ranked schools. natural laws of uncertainty and randomness also dictate that someone from a lesser ranked school can beat a top-ranked school grad to it.
as for the guy looking for schools specializing in private sector placement I will say that just look for the best program you can enter, and then do good research, if possible, something practical and applicable to the private sector, and worry about the placement later. Also, forget about that 'terrible schools' and 'defaults' rant.